Spatiotemporal Analysis Of The Data Model Of The Dbms-stadbs And Storage Mechanism

Spatio-temporal data model is the kernel of spatio-temporal database, namely moving object database, and it's the basis of the other components such as spatio-temporal query. Type system is an efficient approach for data modeling, where a database is viewed as a collection of object classes; these classes and their behavior are captured by ADTs; objects may or may not have aspects of spatio-ternporal data types. In this paper, we describe in detail the procedure of modeling with this approach: based on spatial data model, both abstract model and discrete model needed, defining spatio-temporal algebras in two abstract levels. The abstract model provides the Spatio-Teniporal Analysis Database System (STADBS) with a basis having exact semanteme and distinct concept, while the discrete model is a kind of implementation design, which maps the abstract model into those computable data types in terms of finite sets. STADBS employs the technique of main memory database based on file-memory mapping to implement the management of complex-structured spatio-temporal data. At the end, the unresolved problems and future works are discussed.